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Mammoth Coal safety activity

MSHA violations, accident reports and inspections across the current mine portfolio.

2025-01-01 – 2026-10-31Database snapshot · 2026-10-31

Safety activity

  1. Permissible electric face equipment; maintenance.

    violationRecord 5132585
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $883.00 proposed penalty

  2. Short circuit protection; ratings and settings of circuit breakers.

    violationRecord 5132584
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.601-1 · $151.00 proposed penalty

  3. Electric equipment; examination, testing and maintenance.

    violationRecord 5132583
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.512 · Significant and substantial (S&S) · $10,569.00 proposed penalty

  4. Permissible electric face equipment; maintenance.

    violationRecord 5132582
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $592.00 proposed penalty

  5. Accumulation of combustible materials.

    violationRecord 5132581
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.400 · $818.00 proposed penalty

  6. Verbal Hazard Complaint Inspections

    inspectionRecord F01518D
    ROAD FORK #52 MINE · 4609522

    7.0 on-site hours reported

  7. Roof control plan.

    violationRecord 5132580
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $697.00 proposed penalty

  8. Mining machines, cap lamps; requirements.

    violationRecord 5132579
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1719-4(b) · $504.00 proposed penalty

  9. Protection from falls of roof, face and ribs.

    violationRecord 5096679
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $3,184.00 proposed penalty

  10. Rock dusting.

    violationRecord 5096513
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.402 · $336.00 proposed penalty

  11. Verbal Hazard Complaint Inspections

    inspectionRecord F01518C
    ROAD FORK #52 MINE · 4609522

    5.0 on-site hours reported

  12. Ventilation controls.

    violationRecord 5096677
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.333(c)(3) · $504.00 proposed penalty

  13. Permissible electric face equipment; maintenance.

    violationRecord 5095575
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.503 · $267.00 proposed penalty

  14. Verbal Hazard Complaint Inspections

    inspectionRecord F01518B
    ROAD FORK #52 MINE · 4609522

    15.0 on-site hours reported

  15. Spot Inspections

    inspectionRecord F036044
    ROAD FORK #52 MINE · 4609522

    103(i) · 3.5 on-site hours reported

  16. Protection from falls of roof, face and ribs.

    violationRecord 5134212
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.202(a) · Significant and substantial (S&S) · $1,431.00 proposed penalty

  17. Automatic fire sensors.

    violationRecord 5134211
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1103-1(b) · $151.00 proposed penalty

  18. Machinery and equipment; operation and maintenance.

    violationRecord 5134210
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1725(a) · Significant and substantial (S&S) · $465.00 proposed penalty

  19. Rock dusting.

    violationRecord 5134209
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.402 · $366.00 proposed penalty

  20. Violation — cited standard not reported

    violationRecord 5134208
    ROAD FORK #52 MINE · 4609522

    Significant and substantial (S&S) · $6,194.00 proposed penalty

  21. Quantity and location of firefighting equipment.

    violationRecord 5134207
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.1100-2(f) · $151.00 proposed penalty

  22. Mine ventilation plan; submission and approval.

    violationRecord 5133866
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · $504.00 proposed penalty

  23. Mine ventilation plan; submission and approval.

    violationRecord 5133865
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.370(a)(1) · Significant and substantial (S&S) · $2,503.00 proposed penalty

  24. Roof control plan.

    violationRecord 5133864
    ROAD FORK #52 MINE · 4609522

    30 CFR 75.220(a)(1) · $1,037.00 proposed penalty

  25. Violation — cited standard not reported

    violationRecord 5133863
    ROAD FORK #52 MINE · 4609522

    $168.00 proposed penalty

Sources and definitions

MSHA Violations (issue date), Accidents (accident date) and Inspections (begin date).

Violation titles use current CFR headings to identify the cited rule; they are not the inspector’s account of what happened.

Status is from the current MSHA Mines snapshot, not the selected reporting period. Closed records can retain their last reported controller/operator.

Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.

Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.

S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.

Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.

Portfolio totals use current mine membership, including events before the current owner or operator's tenure.